Drizzling rain, gray skies and cooler temperatures will make for a damp weekend in the Bay Area, officials said Thursday.

Steady, light rain — with patches of moderate showers — will pick up Friday morning, persist through Saturday and taper off Sunday, said Rick Canepa, a National Weather Service meteorologist. Precipitation will be low, however, with no more than a tenth of an inch predicted in San Francisco.

“If people have weekend plans, pretty much plan on it (raining),” Canepa said.

Officials are also keeping an eye on the coast where massive waves will create hazardous conditions. The National Weather Service issued a high surf advisory in effect from 3 p.m. Thursday to 3 a.m. Saturday, warning people of a large shore break and rip currents.

People should never turn their back to waves, stay off rocks and stay back from the water, according to the advisory. The coastline from Sonoma County south through Monterey County, especially west or northwest facing beaches, will be affected. This includes Ocean Beach, Montara State Beach and Marina State Beach (Monterey County).

Cold will cut through the humid air as the weekend progresses. Low temperatures will taper off from low 50s to low 40s, according to the National Weather Service. San Francisco’s low temperature will drop from 56 degrees on Thursday to a chillier 48 degrees Sunday. Oakland will hit a low of 46 degrees, Napa is expected to dip to a low of 40 degrees and Santa Rosa could drop to 39 degrees.

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Despite the cold, rays of sunshine could break through clouds and fog sometime Sunday or Monday, Canepa said.

Meanwhile, more than a foot of snowfall could hit the Sierra. The National Weather Service issued a winter weather advisory from noon Friday to 10 a.m. Saturday, warning that roads will be snow-covered and slippery, visibility could be reduced, travelers could see delays, and chains will likely be necessary on mountain roads.

National Weather Service data show that 2019 has been much wetter than 2018, with rainfall totals since Jan. 1 surpassing not only last year’s numbers but the normal precipitation in a year.

As of Thursday, downtown San Francisco had recorded 23.75 inches of rain since January, surpassing last year’s total of 18.44 inches. The city typically gets 20.59 inches a year. In Oakland, 18.64 inches of rain have fallen since Jan. 1, surpassing 2018’s 15.52 inches. Normal rainfall for Oakland in a year is 18.27 inches.

Santa Rosa has received 48.94 inches this year — nearly twice the 25.84 that fell last year, and more than the normal of 31.13 inches.

Next week could bring more showers, but officials disagree about when the storm will hit.

“There’s some disagreement emerging in the forecast models,” Canepa said. “Stay tuned. We’ll see what the models show.”

Anna Bauman is a reporter from Kansas City, MO covering breaking news for The San Francisco Chronicle metro desk. She recently graduated from the University of Oklahoma where she studied English and worked at the OU Daily student newspaper.